I took this and several pics for a friend and need open honesty.
Be careful about critiques online because sometimes people feel the need to try and re-do the shots for ya...
In the future, there are 2 things that you might want to watch out for when working with similar subject matter, lighting and environment. First, the open shade type of lighting in these photos has a natural blue cast. Most of the time (but not all the time), human subjects will look better with a warmer cast to the light rather than a blue cast. A little bit of warming added in PP might help and it's also possible to shoot with a warming filter on the camera lens. The 81c is really popular for correcting the bluish color cast contained in open shade lighting. Second, you might want to work a little bit more on background control for future shoots. Remember, a photograph is basically a flat surface so any kind of tree branches, street signs, lamp posts etc that are behind a subject can sometimes have the effect of looking like they are attached to and/or growing out of the subject. The easy fix to this problem is to use a longer lens with a shallower DOF because then the background will turn into a blur. But that's not the only option because sometimes just working with the subject a bit more and moving him/her around in the environment is all that's needed.
Good luck with future shoots. The subject is really pretty and she should be proud of the way that she looks in the photos.